利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

34 条记录 (耗时 0.04 秒)

    1-Alpha-Halo-2,2-Difluoro-2-Deoxy-D-Ribofuranose Derivatives and Process for the Preparation Thereof
    13.
    发明申请
    1-Alpha-Halo-2,2-Difluoro-2-Deoxy-D-Ribofuranose Derivatives and Process for the Preparation Thereof 失效
    1-α-卤代-2,2-二氟-2-脱氧-D-呋喃核糖衍生物及其制备方法

    公开(公告)号：US20070238865A1

    公开(公告)日：2007-10-11

    申请号：US11572790

    申请日：2005-06-21

    申请人： Jaeheon Lee ,  Gha Park ,  Moonsub Lee ,  Han Kim ,  Hyo-Jeong Bang ,  Young-Kil Chang ,  Gwan Lee

    发明人： Jaeheon Lee ,  Gha Park ,  Moonsub Lee ,  Han Kim ,  Hyo-Jeong Bang ,  Young-Kil Chang ,  Gwan Lee

    IPC分类号： C07H15/00

    CPC分类号： C07H3/08

    摘要： 1-α-halo-2,2-difluoro-2-deoxy-D-ribofuranose derivative of formula (I) having the 3-hydroxy group protected with a biphenylcarbonyl group is a solid which can be easily purified by a simple procedure such as recrystallization, and therefore, it can be advantageously used as an intermediate in the preparation of gemcitabine in a large scale. Further, the 1-α-halo-2,2-difluoro-2-deoxy-D-ribofuranose derivative of formula (I) can be prepared with high stereoselectivity using the compound of formula (V) as an intermediate.

    摘要翻译： 具有用联苯基羰基保护的3-羟基的式（I）的1-α-卤代-2,2-二氟-2-脱氧-D-呋喃核糖衍生物是可以通过简单的方法容易地纯化的固体，例如 重结晶，因此可以有利地用作大量制备吉西他滨的中间体。 此外，式（I）的1-α-卤代-2,2-二氟-2-脱氧-D-呋喃核糖衍生物可以使用式（V）化合物作为中间体以高立体选择性制备。

    Flameproof styrene containing graft resin compositions substantially free of phenolic resins and containing styrene/acrylonitrile resin compatabilizer
    16.
    发明授权
    Flameproof styrene containing graft resin compositions substantially free of phenolic resins and containing styrene/acrylonitrile resin compatabilizer 失效
    含防火苯乙烯的接枝树脂组合物基本上不含酚醛树脂，并含有苯乙烯/丙烯腈树脂复合材料

    公开(公告)号：US06716900B2

    公开(公告)日：2004-04-06

    申请号：US10052205

    申请日：2002-01-16

    申请人： Bok-Nam Jang ,  Se-Jong Kim ,  Young-Kil Chang ,  Gyu-Cheol Lee

    发明人： Bok-Nam Jang ,  Se-Jong Kim ,  Young-Kil Chang ,  Gyu-Cheol Lee

    IPC分类号： C08K5521

    CPC分类号： C08L55/02 ,  C08F279/02 ,  C08K5/521 ,  C08K5/523 ,  C08L51/04 ,  C08L71/123 ,  C08L81/02 ,  C08L71/12 ,  C08L2666/02 ,  C08L2666/14 ,  C08L2666/24 ,  C08L85/00

    摘要： A flameproof thermoplastic resin composition is substantially free of phenolic resin, red phosphorous and silicone resin and comprises (A) about 40-95 parts by weight of a rubber modified styrene-containing resin comprising (a1) about 20-95% by weight of a styrene-containing graft copolymer resin containing about 19-50% by weight of acrylonitrile in the copolymer excluding rubber and (a2) about 5-80% by weight of a styrene-containing copolymer containing about 19-50% by weight of acrylonitrile; (B) about 5-60 parts by weight of a polyphenylene ether resin; (C) about 2-40 parts by weight of a compatabilizer comprising (c1) a styrene-containing copolymer containing about 5-18% by weight of acrylonitrile in the copolymer per 100 parts by weight of the sum of (A) and (B) or (c2) a styrene-containing graft copolymer having up to about 60% by weight of rubber wherein the compatabilizer contains about 5-18% by weight of acrylonitrile in the copolymer excluding rubber, per 100 parts by weight of the sum of (A) and (B); and (D) about 5-30 parts by weight of an aromatic phosphoric acid ester per 100 parts by weight of the sum of (A) and (B). The physical properties and flame retardance of the resin compositions according to the present invention are adversely affected by the presence of 3% or more by weight of polycarbonate based on the total weight of the composition.

    摘要翻译： 防火热塑性树脂组合物基本上不含酚醛树脂，红磷和有机硅树脂，并且包含（A）约40-95重量份的含橡胶改性苯乙烯的树脂，其包含（a1）约20-95重量％的 在包含橡胶的共聚物中含有约19-50重量％丙烯腈的含苯乙烯接枝共聚物树脂和（a2）约5-80重量％含有约19-50重量％丙烯腈的含苯乙烯共聚物; （B）约5-60重量份聚苯醚树脂; （C）约2-40重量份的组合物，其包含（c1）含有共聚物中约5-18重量％丙烯腈的含苯乙烯共聚物，每100重量份（A）和（B ）或（c2）含有至多约60重量％的橡胶的含苯乙烯的接枝共聚物，其中所述组合物在除橡胶之外的共聚物中含有约5-18重量％的丙烯腈，每100重量份的（ A）和（B）; 和（D）每100重量份（A）和（B）之和约5-30重量份的芳族磷酸酯。 根据本发明的树脂组合物的物理性能和阻燃性受到基于组合物总重量的3重量％或更多重量的聚碳酸酯的不利影响。

    Flameproof styrene-containing graft resin compositions having a particular nitrile content distribution
    20.
    发明授权
    Flameproof styrene-containing graft resin compositions having a particular nitrile content distribution 有权
    具有特定腈含量分布的防火苯乙烯接枝树脂组合物

    公开(公告)号：US06906123B2

    公开(公告)日：2005-06-14

    申请号：US10051368

    申请日：2002-01-17

    申请人： Sang-Hyun Hong ,  Yong-Hae Kweon ,  Bok-Nam Jang ,  Young-Kil Chang ,  Gyu-Cheol Lee

    发明人： Sang-Hyun Hong ,  Yong-Hae Kweon ,  Bok-Nam Jang ,  Young-Kil Chang ,  Gyu-Cheol Lee

    IPC分类号： C08F279/02 ,  C08K5/521 ,  C08L51/04 ,  C08L55/02 ,  C08L71/12 ,  C08L81/02 ,  C08K5/49 ,  C08K5/52

    CPC分类号： C08L55/02 ,  C08F279/02 ,  C08K5/521 ,  C08L51/04 ,  C08L71/123 ,  C08L81/02 ,  C08L2666/14 ,  C08L2666/02 ,  C08L85/00

    摘要： A flameproof thermoplastic resin composition substantially free of phenolic resin, red phosphorous and silicone resin comprises (A) about 40-95 parts by weight of a rubber modified styrene-containing graft copolymer resin, (B) about 5-60 parts by weight of polyphenylene ether resin; (C) about 5-30 parts by weight of aromatic phosphoric acid ester per 100 part by weight of (A) and (B) wherein the styrene-containing copolymer chains in rubber modified styrene-containing resin (A) comprise (i) about 5-20% by weight having an acrylonitrile fractionation content of 0-9% by weight (ii) about 10-40% by weight having an acrylonitrile fractionation content of 9-20% by weight and (iii) about 40-80% by weight having an acrylonitrile fractionation content of not less than 20% by weight acrylonitrile and the sum of (i), (ii), and (iii) is 100% by weight of the total weight of styrene-containing copolymer chains in rubber modified styrene-containing resin (A). The use of a rubber modified styrene-containing copolymer resin having a particular nitrile content distribution with polyphenylene ether resin to form a base resin and an aromatic phosphoric acid ester flame retardant produces resin compositions with high impact strength and flame retardancy. The compositions according to the present invention are substantially free of phenolic resin, red phosphorous, silicone resin and other components that are required by the prior art compositions containing polyphenylene ether resins and ABS type graft copolymers.

    摘要翻译： 基本上不含酚醛树脂，红磷和有机硅树脂的防火热塑性树脂组合物包含（A）约40-95重量份的橡胶改性苯乙烯接枝共聚物树脂，（B）约5-60重量份聚亚苯基 醚树脂; （C）每100重量份的（A）和（B）约5-30重量份的芳族磷酸酯，其中在橡胶改性的含苯乙烯的树脂（A）中含苯乙烯的共聚物链包含（i）约 5-20重量％的丙烯腈分馏含量为0-9重量％（ii）约10-40重量％，丙烯腈分馏含量为9-20重量％，（iii）约40-80重量％ 丙烯腈分馏含量不小于20重量％丙烯腈的重量和（i），（ii）和（iii）的总和为橡胶改性苯乙烯中含苯乙烯共聚物链总重量的100重量％ （A）。 使用具有特定腈含量分布的具有特定腈含量分布的橡胶改性苯乙烯共聚物树脂与聚苯醚树脂形成基础树脂和芳族磷酸酯阻燃剂产生具有高冲击强度和阻燃性的树脂组合物。 根据本发明的组合物基本上不含现有技术中含有聚苯醚树脂和ABS型接枝共聚物的组合物所需的酚醛树脂，红磷，有机硅树脂和其它组分。